First Flashed DSM ECU! (98/99 Flashing FAQ)

[m_0ney_pit]

ceddy did you cross reference the chips from the spyder board to the image logic posted of the 99 gsx board?

the only thing I see possibly being an issue is the differences in resistances of the injectors from a high impedence on the spyder to low impedence on the turbo cars.


Does anyone have an idea which chip is the injector driver?
Also we need to trace fuel pump relay pin to make sure that chip is also the same.

[hediki12]

this is realy cool. ceddy keep up the good work. umm quick question. can you do this in a 1g with the 98-99 2g ecu?

[the_mork]

Yes you can with a little bit of work. Check out the ecuflash section at evolutionm.net for a thread about putting an evo8 ecu in a 1g. If the evo8 ecu can be put in a 1g then so can a 2g ecu.

[VETTE_50_TH]

Originally Posted by Ceddy

Thanks guys.

I flashed the 99 Spyder ecu with the 99 GSX image first, then back to the 99 Spyder, then the 99 GSX again.

Then I flashed the 98 GST image, then the 99 Spyder, and back to the 98 GST.

So all of 98 and 99, GST, GSX, and Spyder ecus are compatible for cross-flashing.


I'll plug the Spyder ecu into the car tomorrow, and check if the knock sensor and the other things the Spyders don't have work correctly.

Thanks again.

####ing nuts. Thats the shit right there.

James

[Ceddy]

Originally Posted by m_0ney_pit

ceddy did you cross reference the chips from the spyder board to the image logic posted of the 99 gsx board?

the only thing I see possibly being an issue is the differences in resistances of the injectors from a high impedence on the spyder to low impedence on the turbo cars.


Does anyone have an idea which chip is the injector driver?
Also we need to trace fuel pump relay pin to make sure that chip is also the same.

I compared my 98 board to the 99 spyder and couldn't find any difference. The programmable logic IC next to the ecu has the same chip number E328, but the serial number is different. Don't know if that matters though.

Turbo cars have low impedance injectors plus a resistor pack, so the ecu sees them as high impedance.

[steve]

Originally Posted by m_0ney_pit

Does anyone have an idea which chip is the injector driver?

There are four discrete transistors that are the drivers for the injectors just like before. I haven't looked closely to see if there are any differences in the rest of the injector driver circuit like the snubbers compared to the earlier ECUs.

I'm limited in what I can do until I figure out how to mod a 1.3 cable to flash. I suspect it's just providing the programming voltage but I haven't seen a 2.0 cable to compare.

[m_0ney_pit]

Did you find that missing resistor in the knock sensor circiut I was talking about?

Any thoughts on the fuel pump relay issue?
Is the 99 spyder rom simialar to the 99 gsx and gst roms?

Originally Posted by Ceddy

I compared my 98 board to the 99 spyder and couldn't find any difference. The programmable logic IC next to the ecu has the same chip number E328, but the serial number is different. Don't know if that matters though.

Turbo cars have low impedance injectors plus a resistor pack, so the ecu sees them as high impedance.

[Ceddy]

Originally Posted by m_0ney_pit

Did you find that missing resistor in the knock sensor circiut I was talking about?

Any thoughts on the fuel pump relay issue?
Is the 99 spyder rom simialar to the 99 gsx and gst roms?

I just tried the spyder ecu in my car, and the fuel pump doesn't turn on.
Everything else seems to work, even the boost gauge seems functional.

I'll try to trace the fuel pump relay and knock sensor pins back to the cpu to see whats different. Hopefully its just something like a missing resistor, that I can add.

[the_mork]

I doubt that this helps much but jjgriz (I think thats how his name is spelled) had to wire up a switched direct circuit for his fuel pump when he went from a 4g64 ecu to a 2g ecu in his Spyder.

[m_0ney_pit]

Ceddy did you have any success with pin tracing?

[Ceddy]

Originally Posted by m_0ney_pit

Ceddy did you have any success with pin tracing?

I see where you are talking about the Knock Sensor Pin is missing a resistor, the 98 GST I have is also missing it there.

I didn't notice before, but the H8 boards are multi-layered(Two PCB glued together, with traces on the inside), this makes tracing them very hard.

Playing with the ecus I found out the Spyder ecu outputs +5vdc to turn the fuel pump on, and the other DSM ecus pull the fuel pump relay to ground.

I'll get a 5v relay and see if everything works with the spyder ecu then.

[Ceddy]

Got the Spyder Ecu working, fuel pump relay needs to be hooked up differently, boost gauge doesn't work, not sure about knock sensor yet.

The motor runs and idles fine, the only CELs I got are the Rear O2 and emissions stuff I don't have hooked up.


Trying to get my 2-Step code working now that I have an ecu to test it on.

[m_0ney_pit]

Wow so not only are you the first person to flash a dsm ecu but you also are the first to convert a dsm spyder ecu to a dsm turbo ecu

If there is no cel for the knock sensor then the ecu should be seeing it. If the timing is staying under 10 degrees under boost then the ecu isn't seeing it.

wonder why the ecu isn't driving the boost gauge. that might be driven by non-flashable firmware at the hardware level.

[Ceddy]

Originally Posted by m_0ney_pit

wonder why the ecu isn't driving the boost gauge. that might be driven by non-flashable firmware at the hardware level.

Looking at it a second time the boost gauge does works, it seems like has less travel though.
Its sits half way to bottom at idle, thought with other ecu it went all the way to bottom.

[m_0ney_pit]

I'm pretty sure the knock sensor will work, a cel appears if it is not connected correct? It says knock sensor circuit malfunction

[Ceddy]

Originally Posted by m_0ney_pit

I'm pretty sure the knock sensor will work, a cel appears if it is not connected correct? It says knock sensor circuit malfunction

Yeah, think so. I'll log Knock Voltage and KnockSum to make sure its working correctly.

[m_0ney_pit]

so what did we learn from the 99 spyder ecu flash experiment?

-All 98-99 dsm images are interchangable and crossflashable from year to year

-spyder owners no longer have to rewire the fuel pump relay module, just flash gsx image to the spyder ecu and it'll work (big plus)

-you can use a spyder ecu in a pinch, there are alot more of these floating around in junk yards than turbo ecus and cheaper

[Ceddy]

Got my Launch Control and CEL on Knock code working!

Still getting the bugs out of the AntiLag code.

The CEL on Knock lights the CEL if you have over a certain number of Knock Counts.
If your CEL is lit from an OBD code, it blinks the CEL off with Knock.

Launch Control use a lower RevLimit until you reach a certain speed then switch to the normal RevLimiter. Also know as 2-Step or Stutterbox.

AntiLag will retard the Ignition Timing when you are using Launch Control, to build boost.

Also have the Map Select done, but haven't tested it yet. It allows you to use the second set of Maps on the ROM. So you could have a pump gas and a race gas tune.



Video: Knock CEL lighting during Launch Control
(I had to turn knock sensitivity all the way up to get my car to knock)

[ed_GST]

wow!!! nice
anxious to try it out

[m_0ney_pit]

This is simply amazing.

[kevbojunior]

this is great. i have a 99 gst and all i gotta do is get it tuned like they do on the stock ecu evos using ecu flash?

[knochgoon24]

Originally Posted by kevbojunior

this is great. i have a 99 gst and all i gotta do is get it tuned like they do on the stock ecu evos using ecu flash?

Yep, except you'll need an openport 2.0 cable, not the 1.3 the evos can use.

[kevbojunior]

is he just finding all the options or does that program just enable them from your ecu to just change them? so i would also be able to get the same person that tunes my buddys evo to tune my car with the same program? im just making sure its that easy. that means speed density should be possible going this route too correct?

[knochgoon24]

Originally Posted by kevbojunior

is he just finding all the options or does that program just enable them from your ecu to just change them? so i would also be able to get the same person that tunes my buddys evo to tune my car with the same program? im just making sure its that easy. that means speed density should be possible going this route too correct?

Ceddy is writing new code for things not included in the factory ROM. He's not just activating preprogrammed stuff.

Once you get the ROM and xml files set up correctly, anyone familiar with ecuflash should be able to tune your car.

[rocafellafw]

Originally Posted by Ceddy

The 98/99 ECUs may not handle the 95/96 Inverted CAS and Crank Trigger Setup well.

Im on a 98/99 ECU and I have a 6-bolt swap with the pigtail CAS is this what you mean by that ? Should I swap to a blacktop ?

[Ceddy]

Originally Posted by rocafellafw

Im on a 98/99 ECU and I have a 6-bolt swap with the pigtail CAS is this what you mean by that ? Should I swap to a blacktop ?

You don't have a 95 or 96 CAS so you will be fine.

The 1G Black Top CAS has the reputation of have the best signal, but the 1G Green Top works fine 99% of the time.

The 95/96 CAS output a signal that is inverted from all the other years.
Its hit or miss with the 95/96 CAS, sometimes your fine, sometimes you get missfires and it runs choppy.

[rEclipserGST]

Originally Posted by Ceddy

I just tried the spyder ecu in my car, and the fuel pump doesn't turn on.
Everything else seems to work, even the boost gauge seems functional.

I'll try to trace the fuel pump relay and knock sensor pins back to the cpu to see whats different. Hopefully its just something like a missing resistor, that I can add.

If the fuel pump was the only problem, why not just rewire it or "rig-wire" it thru an existing fuse?

I have a 95 and my 100% TPS. My buddy has evoscan and it worked on my car. I just need more options to narrow down and fix this throttle problem. My car drives and all but its just a biotch to get above 2.5k rpms, after that it seems fine. BUT if you let off the gas, theres no coming back unless you put it in Neutral, then rev it above 3k then back in drive.

I think its the TPS connector and the wire or ecu related. BTW my ecu is not eprom unfortunately

[m_0ney_pit]

Its not that simple. The chip that controls the fuel pump relay function inside the ecu I believe may be slightly different from gst/gsx to spyder. This chip is controlled at the hardware level and not software via the rom.
This is why when powered on the fuel pump relay pin outputs +5 volts on the spyder because it is expecting to activate a relay called the 'fuel pump relay module' which pulls the fuel pump to ground and activates the fuel pump relay.

On the gst/gsx the ecu does the function of the 'fuel pump relay module' internally by closing the switch to ground activating the fuel pump relay.

Originally Posted by rEclipserGST

If the fuel pump was the only problem, why not just rewire it or "rig-wire" it thru an existing fuse?

unfortunately

[Ceddy]

Originally Posted by rEclipserGST

If the fuel pump was the only problem, why not just rewire it or "rig-wire" it thru an existing fuse?

I have a 95 and my 100% TPS. My buddy has evoscan and it worked on my car. I just need more options to narrow down and fix this throttle problem. My car drives and all but its just a biotch to get above 2.5k rpms, after that it seems fine. BUT if you let off the gas, theres no coming back unless you put it in Neutral, then rev it above 3k then back in drive.

I think its the TPS connector and the wire or ecu related. BTW my ecu is not eprom unfortunately

You can "rig" it by simplely grounding the fuel pump relay wire, but the fuel pump will run when the key is in the ACC position. You really notice how loud a Walboro is once you hear it without the motor running.

The 100% TPS, most likely means the signal isn't get back to the ecu. Check for breaks in the wire and loose pins at the ECU and TPS connectors. Also check for +5v and ground at the TPS connector.



All my DSM code Mods are coming along well, should have a public release soon.

[Hubbard 0]

Originally Posted by Ceddy

You can "rig" it by simplely grounding the fuel pump relay wire, but the fuel pump will run when the key is in the ACC position. You really notice how loud a Walboro is once you hear it without the motor running.

The 100% TPS, most likely means the signal isn't get back to the ecu. Check for breaks in the wire and loose pins at the ECU and TPS connectors. Also check for +5v and ground at the TPS connector.



All my DSM code Mods are coming along well, should have a public release soon.

Even with my car running and having the stripped out rear seats, you hear how loud a walbro is. I wish it was audible outside the car though.